Muffler



Jan. 1, 1946. AW ER 23%,247

MUFFLER Filed May 11, 1943 WEE IN VEN TOR.

Mofria Katcher ATTORNEY Patented Jan. 1, 1946 UNITED STATES PATENT OFFICE MUFFLER Morris Katcher, New York, N. 1!. Application May 11, 1943, Serial fi0. 486,489 14 Claims. (c1. 181 -69) It is an object of the invention to produce a muflier having a housing formed of two mating parts which together form the wall of an elongated chamber. Vanes are attached to one part and extend part way across the chamber leaving a space between the end or a vane and the oppo-- site part. Other vanes, alternating with said first vanes, are attached to the other part and extend therefrom part way across the chamber toward, the flrst part leaving a space on the opposite side of the chamber from said first space. The gas is caused to zigzag across the chamber past the vanes on its way through. The construction of the muffler and its method of assembling is made simple by my design. The two mating parts of the housing, each with its vanes previously attached, are crimped together.

Other objects and advantages will become apparent upon further study of the description and drawing, in which:

Fig. 1 is a sectional plan of the rectangular form of my mufller taken along the line l--l of Fig. 3.

Fig. 2 is a partial section taken 22 of Fig. 1.

Fig. 3 is an end view of the intake end of the muiller.

Fig. 4 is a section taken along the line 4-4 of Fig. 1.

Fig. 5 is a section of an elliptical form of my along the line 'muflier with the vanes having their free ends substantially parallel to the major axis of the ellipse, a part oi the upper vane being broken away to show the one beneath.

Fig. 6 is a section of an elliptical form of my matter with the vanes having their. free ends substantially parallel to the minor axis of the ellipse, a part of the upper vane being broken away to show the one beneath.

Fig. 7 is an elevation of one of the vanes shown by itself, which vane is used in the muiller of Fig. 6.

Fig. 8 is a section through a vane such as the one shown in Fig. 7, except that it has a corrugated surface, and

Fig. 9 is a section of a cylindrical form of my mufiler a part of the upper vane being broken away to show the one beneath.

The muifier of Figs. 1-4 has a housing of two elongated parts, each part being in the form of an angle with flanges extending therefrom. Part 10 is provided with a flange I l and a flange l2, while part I3 is provided with a flange l4 nesting in fiange 'l2, the latter being crimped about it. Flange ii of part l3 is'crimped about flange N. Parts l0 and B when fastened together form the side wall of an elongated chamber 20.

Vanes iii are attached to. part In by means of their flanges l8. In a like manner vanes I! are fastened to part I 3 by means of their flanges IS. The fastening of the flanges to the parts of the housing is preferably by spot welding, Vanes l8 extend part way across chamber 20, a space being left between the end of a vane and part l3. Vanes H, which alternate along the length of chamber 20 with vanes l6, extend part way across said chamber from part l3, a space being left between the end of each vane H and part I 0.

End piece 2| serves as the end wall of the chamber at its inlet end, sleeve connection 22 being mounted on it for attachment to say the exhaust of an internal combustion engine. In a similar manner, end piece 23 serves as the end wall of the chamber at its discharge end, the slowed down gas leaving the chamber through sleeve 24.

It is to be noticed that the spacing of vanes i6 and I7 increases as the discharge end 23 of the chamber is approached.

In operation, the exhaust gas as violently discharged from the engine is received in inlet sleeve 22. In entering the chamber 20 it strikes against the first vane i6, is deflected sideways, strikes housing part l3 from whence it passes through the space between the end of vane l6 and housing part I3. It then passes over vane i1 and through the space between the latter and housing part I 0, continuing to zigzag across the successive vanes and through the spaces between the end of the vanes until it is discharged through sleeve 24. The turbulence given the gas stream because of its tortuous path and the increased spacing of the vanes toward the discharge end of the mufller slow down the velocity of the gas to such an extent that but little sound is produced when the gas is discharged into the air.

Except for the spacing of and location of vanes 18 and I1 parts Ill and it are substantially alike which is advantageous'to their quantity production. The method used in assembling the mufller, is to fabricate parts l0 and I3 and attach their respective vanes. With the two halves of the mufller thus prepared, they are brought together, the vanes of one coming in between the vanes of the other, said halves then being fastened to each other along thei longitudinal edges by crimping flange l2 over flange l4 and flange I 5 over flange ii. End pieces 2i and 23 are then inserted at the ends of the halves and spot welded to them.

\ In the modified form of mother shown in Fig. 5, the casing or housing is of substantially elliptical form. The two halves or parts 25 and 23 of the ellipse are, substantially identical. The edge of each half occurs at the major axis of the ellipse. Half 25 has an outstanding flange 21 over which is crimped flange 36 of half 26. In a similar manner, half 26 has an outstanding flange 28 over which is crimped flange 29 of half 25. Vanes 3| are spot welded at their flange 83 to half 25, while vanes 32 are spot welded at their flange 34 to half 26 said vanes alternating along their halves of the housing or casing as vanes i6 and H of Fig. l alternate along their parts l and I3. Vanes 3i and 32 extend laterally in a direction parallel to the minor axis of the ellipse across the chamber formed by said halves 25 and 25. Said vanes extend well over half way across the chamber, a

space being left between the end of each vane and its opposite half of the housing.

Fig. 6 also shows a mufiler with a substantially elliptical casing, the part 35 thereof being crimped to part 35 as in the case of the muffler of Fig. 5. Vanes 31 are attached to part 35 while vanes 38 are attached to part 36. The vanes extend in opposite directions from their parts, extending in a direction parallel to the major axis of the ellipse. They extend a substantial distance across the chamber, a space being left between their ends and the housing on opposite sides of the housing.

Fig. 9 shows a mufiier with a substantially cylindrical casing, the parts-39 and 40 being substantially semicylinders which are crimped together at their longitudinal edges. Vanes M are attached to .part 39, while vanes 42 are attached to part 40. The vanes extend across the chamber well beyond the longitudinal edges of their parts, a space being left between the end of each vane and the opposite part of the housing.

The mufilers of Figs. 5, 6 and 9 are assembled in a similar manner to the mufiler of Figs. 1 to 4. Each part has its vanes attached to it before assembly. The parts are then crimped together,

.chamber, vanes fixedly attached to one part and unattached to the other extending therefrom across the chamber, a space being left between an end of the vanes and the housing, other vanes fixedly attached to the other part of the housing, extending therefrom in the opposite direction from said fdrmer vanes, said latter vanes being unattached to the first part a space being left between an end of the latter vanes and the opposite side of the housing from said first space, the vanes attached to one part alternating with the vanes attached to the other part, whereby gas entering one end of the chamber is caused to have a tortuous path from one side of the housing to the other at the vanes on its way through said spaces.

2. A muiiier including a housing-formed of two oppositely disposed parts fastened together to form the wall of an elongated chamber, vanes having a, flange extending part way around their edge, each vane being unattached to one part and having its flange fixedly attached to the other part, the vanes being fastened alternately, one to one part and one to the other part, each vane contacting the inside of the housing along its periphery except for a portion substantially less than half the length of said periphery, the vane at said portion being spaced from the housing, succeeding vanes being spaced from opposite sides of the housing, whereby gas entering one end of the chamber is caused to have a tortuous path from one side of the housing to the other at each vane on its way through.

' 3. A mufiier including a housing formed of two parts fastenedtogether in oppositely disposed positions to form the wall of an elongated chamber, vanes fixedly attached to one part and unattached to the other extending therefrom across the chamber, a space being left between an end of the vanes and the housing, other vanes fixedly attached to the other part of thehousing, extending therefrom in the opposite direction from said former vanes, said latter vanes being unattached to the first part, a space being left between an end of the latter vanes and the opposite side of the housing from said first space, the vanes attached to one part alternating along the length of the chamber with the vanes attached to the other part, except for the spacing of the vanes, one part being substantially the duplicate of the other, gas entering one end of the chamber is forced through it in a tortuous path from one side of the housing to the other at the vanes on its way through said spaces.

4. A mufller including a housing formed of two parts fastened together in oppositely disposed positions to form the side wall of an elongated chamber, pieces extending laterally between the ends of said parts and fastened thereto, said pieces forming the end walls of the chamber, vanes fixedly attached to one part and unattached to the other. extending laterally therefrom across the chamber, a space being left between an end of the vanes and the housing, other vanes fixedly attached to the other part of the housing, extending laterally therefrom in the opposite direction from said former vanes, said latter vanes being unattached to the first part, a space being left between an end of the latter vanes and the opposite side of the housing from said first space, the vanes attached to one part alternating along the length of the chamber with the v'anes attached to the other part, whereby gas entering one end of the chamber is caused to have a tortuous path from one side of the housing to the other at the vanes on its way through said spaces.

5. A mufller for use in an internal combustion engine, said mufiler including a housing formed of two parts fastened together to form the side wall of an elongated chamber, pieces extending laterally between the ends of said parts and fastened thereto forming the end walls of the chamber, means on one end wall for connecting the chamber with the exhaust of the engine, the other end wall having an opening therein for the discharge of the gas from the chamber, vanes fixedly attached to one part and unattached to the other extending laterally well across the chamber, a space being left, however, between an oceans? end the vanes and the scond part of the housing, other vanes fixedly attached to the second part of the housing and unattached to the first part, said latter vanes also extending laterally well across the chamber, a space also being left between the end of the latter vanes and the first part of the housing, the vanes attached to the first part alternating along the length of the chamber, whereby gas entering one end 0! the chamber is caused to have a tortuous :path from one side or the housing to the other at the vanes on its way throughsaid spaces.

6. A muiiler including a housing enclosing an elongated chamber, vanes extending well across the chamber from one side of the housing but leaving a space between an end of the vanes and the opposite side of the housing, other vanes alternating along the length or the chamber with the first vanes extending well across the chamber from said opposite side of the housing but leaving a space between the end of the latter vanes and the first side of the housing, the longitudinal spacing between successive vanes increasing from one end of the chamber to the other, said housing having an opening for receiving gas under pressure at the end of the chamber where the vanes are closer together, and another opening at the other end of the chamber for the discharge of the gas, gas entering the chamber at the receiving end is forced through it in a tortuous path from one side of the housing to the other at each vane on its way through said spaces.

7. A mullier including a housing termed of two parts fastened together in oppositely disposed positions to form the wall of an elongated chamber, vanes ilxedly attached to one part and unattached to the others extending laterally therefrom across the chamber, a space being left between an end of the vanes and the other part of the housing, other vanes fixedly attached to said other part of the housing extending in the opposite direction from said former vanes across the chamber, said latter vanes being unattached to the first part, a space being left between the end of said other vanes and the first part oi the housing, the vanes attached to one part alternating along the length of the chamber with the vanes attached to the other part, the spacing between successive vanes increasing from one end oi the housing to the other, except for the spacing of the vanes, one part being substantially the duplicate of the other, one part having a fold over the other at their edges for holding them together, said housing receiving gas under pressure at the end of the chamber where the vanes are closer together, gas entering the chamber at said latter end is forced through the chamber in a tortuous path from one side of the housing to the other at the vanes on its way through said spaces.

8. A mulller including a housing formed of two elongated parts each in the form of an angle, said parts being fastened togetherv substantially at their longitudinal edges in oppositely disposed positions to form the wall of a chamber quadrilateral in cross section, vanes fixedly attached to one angle and unattached tothe other extending therefrom well across the chamber toward the second angle, a space being left between the end of the vanes and the second angle, other vanes fixedly attached to said second angle extending therefrom well across the chamber toward the first angle, said latter vanes being unattached to the first part, a space being left between the end 0! the second vanes and the first angle, the vanes concave elongated parts curvilinear in cross section, said parts being i'astened together at their longitudinal edges in oppositely disposed positions to form the wall of a chamber, vanes fixedly attached to one part and unattached to the other extending laterally therefrom well across the chamber but stopping short of the other part leaving a space thereby between its edge and said other part, other vanes fixedly attached to said other part extending therefrom in the opposite direction from said first vanes leaving a space between the first part of the housing and the edge of said other vanes, said latter vanes being unattached to the first part, the vanes attachcd to one part alternating along the length of the chamber with the vanes attached to the other part. whereby gas entering one end of the chamber is caused to have a tortuous path from one side of the housing to the other at the vanes on its way through said spaces.

10. A handler including a housing formed of two elongated parts substantially semi-elliptical in cross section, the longitudinal edges of said parts being substantially at the major axis of the ellipse, said parts being fastened together sub stantially at their longitudinal edges in oppositely disposed positions to form an elongated substantially elliptical chamber, vanes fixedly at tached to one part and unattached to the other extending well across the chamber in a direction parallel to the minor axis of the ellipse, a space being left between the end of the vanes and the other part of the housing, other vanes fixedly attached to the other part of housing extendingweli across the chamber in an opposite direction from the first vanes but also parallel to the minor: axis of the ellipse, said latter vanes being unattached to the first part, the vanes attached to one part alternating along the length of the chamber with the vanes attached to the other part, whereby gas entering one end oi the chamber is caused to have a tortuous path from one side oi the housing to the other at the vanes on its way through said spaces.

11. A number including a housing formed of two elongated parts fastened together substantially at their longitudinal edges in oppositely disposed positions to form an elongated substantially elliptical chamber, vanes fixedly attached to one of said parts and unattached to the other, extending laterally therefrom part way across the chamber in a direction parallel to the major axis of the ellipse leaving a space thereby between the end of the vanes-and the other part of the housing, other vanes fixedly attached to the other part of the housing extending laterally therefrom part way across the chamber in an opposite direction from the first vanes but also parallel to the major axis of the ellipse, said other vanesleaving a space elongated parts, substantially semi-circular in cross section, said parts being fastened together substantially at their longitudinal edges in oppositely disposed positions to form an elongated cylindrical chamber, vanes fixedly attached to one part and unattached to the other extending part way across the chamber but beyond the Junction of said parts, a space being left between the end of the vanes and the other part, other vanes fixedly attached to the other part of the housing extending part way across the chamber in the opposite direction from the first vanes, said other vanes extending beyond the junction of the parts on the other side thereof from said first vanes, a space being left between the ends of said other vanes and the first side of the housing. said vanes being formed with corrugations extending substantially at right angles to said lateral direction,

as entering the chamber at one end being caused to'have a tortuous path from one side of the housing to the other at the vanes on its way through vanes and the first part of the housing, said latter elongated chamber, vanes extending laterally well across the chamber from one side of the housing but leaving a space between an end of the vanes and the opposite side of the housing, other vanes alternating along the length of the chamber with the first vanes extending laterally well across the chamber from said opposite side of the housing but leaving a space between the end of the latter said spaces.

14. A mufller including a housing enclosing an elongated chamber, 'vanes extending across the chamber from one side of the housing but leaving a space between an end of the vanes and the opposite side of the housing, other vanes, altematingalong the length of the chamber with the first vanes, extending across the chamber from said opposite side of the housing but leaving a space between the end of the latter vanes and the first side of the housing, the longitudinal spacing between successive vanes at one part along the length of the chamber being greater than said latter spacing at another part of the chamber,-

and the space between the end of the vanes and the housing being greater where the vanes are farther apart than where they are closer together, said housing having an opening for receiving gas under pressure at one end of the chamber, and

another opening at the other end of the chamber for the discharge of the gas, gas entering the chamber at the receiving end being forced through it in a tortuous path from one side of the housing to the other at the vanes on its way through said spaces. MORRIS KATCHER. 

